From: Mengdong Lin mengdong.lin@linux.intel.com
A machine driver can register the two ops.
When a DAI link is added or removed by a component's topology, the ASoC core can call the ops to notify the machine driver for extra intialization or destruction.
E.g. topology can create FE DAI links from a cpu DAI component, and the machine driver may define an add_dai_link ops to set machine-specific .init ops for the DAI link.
Signed-off-by: Mengdong Lin mengdong.lin@linux.intel.com
diff --git a/include/sound/soc.h b/include/sound/soc.h index d1583df..f28b36e 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -1107,6 +1107,11 @@ struct snd_soc_card { struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level);
+ int (*add_dai_link)(struct snd_soc_card *, + struct snd_soc_dai_link *link); + void (*remove_dai_link)(struct snd_soc_card *, + struct snd_soc_dai_link *link); + long pmdown_time;
/* CPU <--> Codec DAI links */ diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 679379d..c504d04 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1260,6 +1260,12 @@ int snd_soc_add_dai_link(struct snd_soc_card *card, }
lockdep_assert_held(&client_mutex); + /* Notify the machine driver for extra initialization + * on the link created by topology. + */ + if (dai_link->dobj.type && card->add_dai_link) + card->add_dai_link(card, dai_link); + list_add_tail(&dai_link->list, &card->dai_link_list); card->num_dai_links++;
@@ -1290,6 +1296,12 @@ void snd_soc_remove_dai_link(struct snd_soc_card *card, }
lockdep_assert_held(&client_mutex); + /* Notify the machine driver for extra destruction + * on the link created by topology. + */ + if (dai_link->dobj.type && card->remove_dai_link) + card->remove_dai_link(card, dai_link); + list_for_each_entry_safe(link, _link, &card->dai_link_list, list) { if (link == dai_link) { list_del(&link->list);